Twenty-one people, all male, were executed in the United States in 1963, thirteen by electrocution, six by gas chamber, and two by hanging.
The states of New York and New Jersey would carry out their final executions before abolishing capital punishment in 2004 and 2007 respectively. The United States federal government would also conduct their last execution in the pre-Furman v. Georgia era, with the next occurring in 2001. Furthermore, all pending executions at the end of the year were postponed due to the Assassination of John F. Kennedy.